Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/14321
Título: Flow-Injection Spectrophotometric Determination of Bromate in Bottled Drinking Water Samples Using Chlorpromazine Reagent and a Liquid Waveguide Capillary Cell
Autor: Tóth, Ildikó V.
Santos, Inês C.
Azevedo, Cláudia F. M.
Fernandes, Jorge F. S.
Páscoa, Ricardo N. M. J.
Mesquita, Raquel B. R.
Rangel, António O. S. S.
Data: 2013
Editora: The Japan Society for Analytical Chemistry
Citação: TÓTH, Ildikó V. ...[et al.] - Flow-Itomnjection Spectrophoetric Determination of Bromate in Bottled Drinking Water Samples Using Chlorpromazine Reagent and a Liquid Waveguide Capillary Cell. Analytical Sciences. ISSN 0910-6340. Vol. 29 (2013), p. 563-570
Resumo: In this work, aiming to develop a simple, inexpensive method for the determination of low bromate levels in water samples, a liquid waveguide capillary cell (LWCC) was coupled to a FIA system. The long optical path (100 cm) of the LWCC was used to improve the sensitivity and the limit of detection without resorting to any off-line or in-line preconcentration processes. The spectrophotometric determination was based on the oxidation of chlorpromazine by bromate in an acidic medium, resulting in the formation of a colored radical product. Sulfamic acid was added to the reagent for minimizing the interference of nitrite, and a chelating ion exchange resin was used to remove major cationic interferences. The developed system allowed the determination of bromate within the range between 1 – 20 μg L–1 with a detection limit of 0.2 μg L–1
Peer review: yes
URI: http://hdl.handle.net/10400.14/14321
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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